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Power set: Difference between revisions
→{{header|Common Lisp}}: add an example
(→{{header|Go}}: Improved set type. Could be considered a bug fix. Set equality code was requiring sets to be in the same order. New code follows conventional meaning of set as an unordered collection.) |
(→{{header|Common Lisp}}: add an example) |
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Line 556:
>(powerset '(1 2 3)
(NIL (1) (2) (1 2) (3) (1 3) (2 3) (1 2 3))
Yet another imperative solution, this time with dolist.
<lang lisp>(defun power-set (list)
(let ((pow-set (list nil)))
(dolist (element (reverse list) pow-set)
(dolist (set pow-set)
(push (cons element set) pow-set)))))</lang>
Output:
>(power-set '(1 2 3))
((1) (1 3) (1 2 3) (1 2) (2) (2 3) (3) NIL)
=={{header|D}}==
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